Comment Re:Overblown Hyperbole (Score 1) 107
Some of the hacks that claim to be done wirelessly have relied on reprogramming entertainment firmware, others simply flooding the bus as you've surmised. The OBDII port is but one way into the bus, any device on the bus offers access to this bus to include some surprisingly easy to access places. It's a shared network, nothing knows that these signals from from the OBDII port. Rate limiting WILL call for more processing, something has to count packets and have smarts - you've added another computer to the bus it seems.
I don't think you're going to get a light on the dash for diag mode, how would that work? For one thing you're going to complicate diagnostics and end up having to build in new interfaces or replace existing diagnostics - yuck. If they can get in past a locked door, they can get into the glovebox. I'm not such a special snowflake that anyone is trying either of these.
An interface between the OBDII and the bus might slow some of this but it may also screw with diagnostics, it's an interesting idea but it will also increase cost in an industry that tries to shave pennies off of a production run
As for controllability - I can make thermite at home if I want and I can use the same BT interface you're slapping into an OBDII port for a controller to light the stuff. You're not buying any real safety but you DO make things more complicated. Oh and yes I do drive with an interface plugged in, sometimes BT, more often wired. I'm not concerned that someone will interface with it - seriously. I would remove it if I were, the OEMs aren't offering that sort of access to the system from the factory.
Bottom line - why are we so much more worried about this when the capability to do all sorts of wicked things exists already right now at the local hardware store? Why does cyber make it more scary?